Building muscles around the shin?

Are there any good excercises to build muscles around the shin bone for Shin to shin conditioning for Kickboxing?

Thanks

Dorsiflexion!

Take a DB and put it between your feet. Sit on a bench with your legs outstretched out in front of you (be sure to keep legs completely flexed, try not to bend your knees). Lean back a little bit for balance and move your toes up and down with the DB between your feet. Coach Waterbury recommends this exercise!

I use to thai-box and an exercise that I used to use was dorsi-flexion. Sit on a bench, legs together, knees just behind end of bench. Now place a dumbell between your feet in the flexed start position (feet pointing up) and then lower to toes pointed and then back up to start. This will build up the tibialis anterior to protect your shin bones.